![Greg Kroah-Hartman](/assets/img/avatar_default.png)
splits OTG functionality away from transceivers. We have known for quite a long time that struct otg_transceiver was a bad name for the structure, considering transceiver is far from being OTG-specific (see4e67185
). -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJPTeeMAAoJEIaOsuA1yqRE6ZAP/j2G6DaDyng6vpyYQi2drXaY NKx3pA0sC98NACOv6sh+urcMDcDctLmOnwV18U+GNNP+qExQFnyuc7iGsXRxfUOj qkIbVPxzPcE0opmEMFJ5ZT85rw33DqKjFnQT4av3wwXe/qSrEkAfBoBSb6wn73rA v0JOhceGsFb+kJAc7U9Ji9A9xSjj+6uw08RTuuQv8KBLb5Pws+NoQ6UEjlni8umA lkOSelyBZN1OJU+fZKIpS4+SiwtdkZCm2wSIUiwaPosdJgw0w8fz0zNjn/4gAHB1 oPyjjjP3/VDegp9CuYDRlnBgQa2K4V1vbjrBfhKbyar8fsOSoaPVv1fR9VKgVnT8 RKlXKSeFEsdP4fOGYCjNKAzjeQH/qSNzdzo+s4GMqoWq7Lm3+b56zdQWvRmTT7Xg ++bMqFAi0noeU8aZWwSDMFiYv6O19o+Px4OTS/3aRmR1wdJpUUSk2M7Quw6A/YNj 4Q5hDvio2eYtI1nya9yMS/j4ZiJ5fDQb5jUfBDB1MKtkZKKzVVSboK8P/rFq5+xf xdUfBRd7/fMk+he6RtemfjhMdYTiX6Cm6VzveZVBL4+7dERbnJDRgDhSJOYvA/eW Bvc7BY+/EYz7msF0gjLyWu3BBiChajk/D5ukoCIssUPGuIhmO1S7JRi1s+fLaNs3 Bz8Haxql69YWrNL2ouQf =WiB6 -----END PGP SIGNATURE----- Merge tag 'xceiv-for-v3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next USB: transceiver changes for 3.4 Here we have a big rework done by Heikki Krogerus (thanks) which splits OTG functionality away from transceivers. We have known for quite a long time that struct otg_transceiver was a bad name for the structure, considering transceiver is far from being OTG-specific (see4e67185
).
220 lines
4.6 KiB
C
220 lines
4.6 KiB
C
/*
|
|
* Copyright (C) 2010 ST-Ericsson AB
|
|
* Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
|
|
*
|
|
* Based on omap2430.c
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/io.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include "musb_core.h"
|
|
|
|
struct ux500_glue {
|
|
struct device *dev;
|
|
struct platform_device *musb;
|
|
struct clk *clk;
|
|
};
|
|
#define glue_to_musb(g) platform_get_drvdata(g->musb)
|
|
|
|
static int ux500_musb_init(struct musb *musb)
|
|
{
|
|
musb->xceiv = usb_get_transceiver();
|
|
if (!musb->xceiv) {
|
|
pr_err("HS USB OTG: no transceiver configured\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ux500_musb_exit(struct musb *musb)
|
|
{
|
|
usb_put_transceiver(musb->xceiv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct musb_platform_ops ux500_ops = {
|
|
.init = ux500_musb_init,
|
|
.exit = ux500_musb_exit,
|
|
};
|
|
|
|
static int __devinit ux500_probe(struct platform_device *pdev)
|
|
{
|
|
struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
|
|
struct platform_device *musb;
|
|
struct ux500_glue *glue;
|
|
struct clk *clk;
|
|
|
|
int ret = -ENOMEM;
|
|
|
|
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
|
|
if (!glue) {
|
|
dev_err(&pdev->dev, "failed to allocate glue context\n");
|
|
goto err0;
|
|
}
|
|
|
|
musb = platform_device_alloc("musb-hdrc", -1);
|
|
if (!musb) {
|
|
dev_err(&pdev->dev, "failed to allocate musb device\n");
|
|
goto err1;
|
|
}
|
|
|
|
clk = clk_get(&pdev->dev, "usb");
|
|
if (IS_ERR(clk)) {
|
|
dev_err(&pdev->dev, "failed to get clock\n");
|
|
ret = PTR_ERR(clk);
|
|
goto err2;
|
|
}
|
|
|
|
ret = clk_enable(clk);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to enable clock\n");
|
|
goto err3;
|
|
}
|
|
|
|
musb->dev.parent = &pdev->dev;
|
|
musb->dev.dma_mask = pdev->dev.dma_mask;
|
|
musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
|
|
|
|
glue->dev = &pdev->dev;
|
|
glue->musb = musb;
|
|
glue->clk = clk;
|
|
|
|
pdata->platform_ops = &ux500_ops;
|
|
|
|
platform_set_drvdata(pdev, glue);
|
|
|
|
ret = platform_device_add_resources(musb, pdev->resource,
|
|
pdev->num_resources);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to add resources\n");
|
|
goto err4;
|
|
}
|
|
|
|
ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to add platform_data\n");
|
|
goto err4;
|
|
}
|
|
|
|
ret = platform_device_add(musb);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register musb device\n");
|
|
goto err4;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err4:
|
|
clk_disable(clk);
|
|
|
|
err3:
|
|
clk_put(clk);
|
|
|
|
err2:
|
|
platform_device_put(musb);
|
|
|
|
err1:
|
|
kfree(glue);
|
|
|
|
err0:
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit ux500_remove(struct platform_device *pdev)
|
|
{
|
|
struct ux500_glue *glue = platform_get_drvdata(pdev);
|
|
|
|
platform_device_del(glue->musb);
|
|
platform_device_put(glue->musb);
|
|
clk_disable(glue->clk);
|
|
clk_put(glue->clk);
|
|
kfree(glue);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ux500_suspend(struct device *dev)
|
|
{
|
|
struct ux500_glue *glue = dev_get_drvdata(dev);
|
|
struct musb *musb = glue_to_musb(glue);
|
|
|
|
usb_phy_set_suspend(musb->xceiv, 1);
|
|
clk_disable(glue->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ux500_resume(struct device *dev)
|
|
{
|
|
struct ux500_glue *glue = dev_get_drvdata(dev);
|
|
struct musb *musb = glue_to_musb(glue);
|
|
int ret;
|
|
|
|
ret = clk_enable(glue->clk);
|
|
if (ret) {
|
|
dev_err(dev, "failed to enable clock\n");
|
|
return ret;
|
|
}
|
|
|
|
usb_phy_set_suspend(musb->xceiv, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops ux500_pm_ops = {
|
|
.suspend = ux500_suspend,
|
|
.resume = ux500_resume,
|
|
};
|
|
|
|
#define DEV_PM_OPS (&ux500_pm_ops)
|
|
#else
|
|
#define DEV_PM_OPS NULL
|
|
#endif
|
|
|
|
static struct platform_driver ux500_driver = {
|
|
.probe = ux500_probe,
|
|
.remove = __devexit_p(ux500_remove),
|
|
.driver = {
|
|
.name = "musb-ux500",
|
|
.pm = DEV_PM_OPS,
|
|
},
|
|
};
|
|
|
|
MODULE_DESCRIPTION("UX500 MUSB Glue Layer");
|
|
MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
static int __init ux500_init(void)
|
|
{
|
|
return platform_driver_register(&ux500_driver);
|
|
}
|
|
module_init(ux500_init);
|
|
|
|
static void __exit ux500_exit(void)
|
|
{
|
|
platform_driver_unregister(&ux500_driver);
|
|
}
|
|
module_exit(ux500_exit);
|